294 	u32 u;  in read_extra_features()  local
296 	__asm__("mrc p15, 1, %0, c15, c1, 0" : "=r" (u));  in read_extra_features()
298 	return u;  in read_extra_features()
301 static inline void write_extra_features(u32 u)  in write_extra_features()  argument
303 	__asm__("mcr p15, 1, %0, c15, c1, 0" : : "r" (u));  in write_extra_features()
308 	u32 u;  in disable_l2_prefetch()  local
314 	u = read_extra_features();  in disable_l2_prefetch()
315 	if (!(u & 0x01000000)) {  in disable_l2_prefetch()
317 		write_extra_features(u | 0x01000000);  in disable_l2_prefetch()
323 	u32 u;  in enable_l2()  local
325 	u = read_extra_features();  in enable_l2()
326 	if (!(u & 0x00400000)) {  in enable_l2()
334 		write_extra_features(u | 0x00400000);  in enable_l2()